public interface BoxInterface { 
// inserts a Blob into the box, returning true, or, 
// if the Blob will not fit into the box, false 
public boolean insert(BlobInterface b); 

// returns the remaining capacity of the box. 
public double remainingCapacity(); 

// prints out the weights of all of the Blobs in the 
// Box, followed by the total weight 
public void printContents(); 
} 

